Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1021/acs.langmuir.6b02173 |
Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia) | |
Rykaczewski, Konrad1; Jordan, Jacob S.2; Linder, Rubin1; Woods, Erik T.1; Sun, Xiaoda1; Kemme, Nicholas1; Manning, Kenneth C.1; Cherry, Brian R.2; Yarger, Jeffery L.2; Majure, Lucas C.3,4 | |
通讯作者 | Rykaczewski, Konrad |
来源期刊 | LANGMUIR
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ISSN | 0743-7463 |
出版年 | 2016 |
卷号 | 32期号:36页码:9335-9341 |
英文摘要 | Cacti thrive in xeric environments through specialized water storage and collection tactics such as a shallow, widespread root system that maximizes rainwater absorption and spines adapted for fog droplet collection. However, in many cacti, the epidermis, not the spines, dominates the exterior surface area. Yet, little attention has been dedicated to studying interactions of the cactus epidermis with water drops. Surprisingly, the epidermis of plants in the genus Opuntia, also known as prickly pear cacti, has water-repelling characteristics. In this work, we report that surface properties of cladodes of 25 taxa of Opuntia grown in an arid Sonoran climate switch from water-repelling to superwetting under water impact over the span of a single season. We show that the old cladode surfaces are not superhydrophilic, but have nearly vanishing receding contact angle. We study water drop interactions with, as well as nano/microscale topology and chemistry of, the new and old cladodes of two Opuntia species and use this information to uncover the microscopic mechanism underlying this phenomenon. We demonstrate that composition of extracted wax and its contact angle do not change significantly with time. Instead, we show that the reported age dependent wetting behavior primarily stems from pinning of the receding contact line along multilayer surface microcracks in the epicuticular wax that expose the underlying highly hydrophilic layers. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000383318100026 |
WOS关键词 | CONTACT-ANGLE HYSTERESIS ; LEAF SURFACE ; CHEMICAL-COMPOSITION ; EPICUTICULAR WAX ; LIQUID-DROPS ; FOG ; WETTABILITY ; COLLECTION ; MICROMORPHOLOGY ; CONTAMINATION |
WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary |
WOS研究方向 | Chemistry ; Materials Science |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194967 |
作者单位 | 1.Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA; 2.Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA; 3.Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ 85008 USA; 4.Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA |
推荐引用方式 GB/T 7714 | Rykaczewski, Konrad,Jordan, Jacob S.,Linder, Rubin,et al. Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia)[J]. Arizona State University,2016,32(36):9335-9341. |
APA | Rykaczewski, Konrad.,Jordan, Jacob S..,Linder, Rubin.,Woods, Erik T..,Sun, Xiaoda.,...&Majure, Lucas C..(2016).Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia).LANGMUIR,32(36),9335-9341. |
MLA | Rykaczewski, Konrad,et al."Microscale Mechanism of Age Dependent Wetting Properties of Prickly Pear Cacti (Opuntia)".LANGMUIR 32.36(2016):9335-9341. |
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